[857] | 1 | /*
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| 2 | *
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| 3 | * Copyright (c) 2003
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| 4 | * John Maddock
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| 5 | *
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| 6 | * Use, modification and distribution are subject to the
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| 7 | * Boost Software License, Version 1.0. (See accompanying file
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| 8 | * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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| 9 | *
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| 10 | */
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| 11 |
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| 12 | /*
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| 13 | * LOCATION: see http://www.boost.org for most recent version.
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| 14 | * FILE u32regex_iterator.hpp
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| 15 | * VERSION see <boost/version.hpp>
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| 16 | * DESCRIPTION: Provides u32regex_iterator implementation.
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| 17 | */
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| 18 |
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| 19 | #ifndef BOOST_REGEX_V4_U32REGEX_ITERATOR_HPP
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| 20 | #define BOOST_REGEX_V4_U32REGEX_ITERATOR_HPP
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| 21 |
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| 22 | namespace boost{
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| 23 |
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| 24 | #ifdef BOOST_HAS_ABI_HEADERS
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| 25 | # include BOOST_ABI_PREFIX
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| 26 | #endif
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| 27 |
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| 28 | template <class BidirectionalIterator>
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| 29 | class u32regex_iterator_implementation
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| 30 | {
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| 31 | typedef u32regex regex_type;
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| 32 |
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| 33 | match_results<BidirectionalIterator> what; // current match
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| 34 | BidirectionalIterator base; // start of sequence
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| 35 | BidirectionalIterator end; // end of sequence
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| 36 | const regex_type re; // the expression
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| 37 | match_flag_type flags; // flags for matching
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| 38 |
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| 39 | public:
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| 40 | u32regex_iterator_implementation(const regex_type* p, BidirectionalIterator last, match_flag_type f)
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| 41 | : base(), end(last), re(*p), flags(f){}
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| 42 | bool init(BidirectionalIterator first)
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| 43 | {
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| 44 | base = first;
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| 45 | return u32regex_search(first, end, what, re, flags, base);
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| 46 | }
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| 47 | bool compare(const u32regex_iterator_implementation& that)
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| 48 | {
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| 49 | if(this == &that) return true;
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| 50 | return (&re.get_data() == &that.re.get_data()) && (end == that.end) && (flags == that.flags) && (what[0].first == that.what[0].first) && (what[0].second == that.what[0].second);
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| 51 | }
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| 52 | const match_results<BidirectionalIterator>& get()
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| 53 | { return what; }
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| 54 | bool next()
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| 55 | {
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| 56 | //if(what.prefix().first != what[0].second)
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| 57 | // flags |= match_prev_avail;
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| 58 | BidirectionalIterator next_start = what[0].second;
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| 59 | match_flag_type f(flags);
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| 60 | if(!what.length())
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| 61 | f |= regex_constants::match_not_initial_null;
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| 62 | //if(base != next_start)
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| 63 | // f |= regex_constants::match_not_bob;
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| 64 | bool result = u32regex_search(next_start, end, what, re, f, base);
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| 65 | if(result)
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| 66 | what.set_base(base);
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| 67 | return result;
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| 68 | }
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| 69 | private:
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| 70 | u32regex_iterator_implementation& operator=(const u32regex_iterator_implementation&);
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| 71 | };
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| 72 |
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| 73 | template <class BidirectionalIterator>
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| 74 | class u32regex_iterator
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| 75 | #ifndef BOOST_NO_STD_ITERATOR
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| 76 | : public std::iterator<
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| 77 | std::forward_iterator_tag,
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| 78 | match_results<BidirectionalIterator>,
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| 79 | typename re_detail::regex_iterator_traits<BidirectionalIterator>::difference_type,
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| 80 | const match_results<BidirectionalIterator>*,
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| 81 | const match_results<BidirectionalIterator>& >
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| 82 | #endif
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| 83 | {
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| 84 | private:
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| 85 | typedef u32regex_iterator_implementation<BidirectionalIterator> impl;
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| 86 | typedef shared_ptr<impl> pimpl;
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| 87 | public:
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| 88 | typedef u32regex regex_type;
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| 89 | typedef match_results<BidirectionalIterator> value_type;
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| 90 | typedef typename re_detail::regex_iterator_traits<BidirectionalIterator>::difference_type
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| 91 | difference_type;
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| 92 | typedef const value_type* pointer;
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| 93 | typedef const value_type& reference;
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| 94 | typedef std::forward_iterator_tag iterator_category;
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| 95 |
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| 96 | u32regex_iterator(){}
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| 97 | u32regex_iterator(BidirectionalIterator a, BidirectionalIterator b,
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| 98 | const regex_type& re,
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| 99 | match_flag_type m = match_default)
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| 100 | : pdata(new impl(&re, b, m))
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| 101 | {
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| 102 | if(!pdata->init(a))
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| 103 | {
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| 104 | pdata.reset();
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| 105 | }
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| 106 | }
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| 107 | u32regex_iterator(const u32regex_iterator& that)
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| 108 | : pdata(that.pdata) {}
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| 109 | u32regex_iterator& operator=(const u32regex_iterator& that)
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| 110 | {
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| 111 | pdata = that.pdata;
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| 112 | return *this;
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| 113 | }
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| 114 | bool operator==(const u32regex_iterator& that)const
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| 115 | {
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| 116 | if((pdata.get() == 0) || (that.pdata.get() == 0))
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| 117 | return pdata.get() == that.pdata.get();
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| 118 | return pdata->compare(*(that.pdata.get()));
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| 119 | }
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| 120 | bool operator!=(const u32regex_iterator& that)const
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| 121 | { return !(*this == that); }
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| 122 | const value_type& operator*()const
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| 123 | { return pdata->get(); }
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| 124 | const value_type* operator->()const
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| 125 | { return &(pdata->get()); }
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| 126 | u32regex_iterator& operator++()
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| 127 | {
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| 128 | cow();
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| 129 | if(0 == pdata->next())
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| 130 | {
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| 131 | pdata.reset();
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| 132 | }
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| 133 | return *this;
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| 134 | }
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| 135 | u32regex_iterator operator++(int)
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| 136 | {
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| 137 | u32regex_iterator result(*this);
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| 138 | ++(*this);
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| 139 | return result;
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| 140 | }
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| 141 | private:
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| 142 |
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| 143 | pimpl pdata;
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| 144 |
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| 145 | void cow()
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| 146 | {
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| 147 | // copy-on-write
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| 148 | if(pdata.get() && !pdata.unique())
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| 149 | {
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| 150 | pdata.reset(new impl(*(pdata.get())));
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| 151 | }
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| 152 | }
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| 153 | };
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| 154 |
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| 155 | typedef u32regex_iterator<const char*> utf8regex_iterator;
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| 156 | typedef u32regex_iterator<const UChar*> utf16regex_iterator;
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| 157 | typedef u32regex_iterator<const UChar32*> utf32regex_iterator;
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| 158 |
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| 159 | inline u32regex_iterator<const char*> make_u32regex_iterator(const char* p, const u32regex& e, regex_constants::match_flag_type m = regex_constants::match_default)
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| 160 | {
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| 161 | return u32regex_iterator<const char*>(p, p+std::strlen(p), e, m);
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| 162 | }
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| 163 | #ifndef BOOST_NO_WREGEX
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| 164 | inline u32regex_iterator<const wchar_t*> make_u32regex_iterator(const wchar_t* p, const u32regex& e, regex_constants::match_flag_type m = regex_constants::match_default)
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| 165 | {
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| 166 | return u32regex_iterator<const wchar_t*>(p, p+std::wcslen(p), e, m);
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| 167 | }
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| 168 | #endif
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| 169 | #ifndef U_WCHAR_IS_UTF16
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| 170 | inline u32regex_iterator<const UChar*> make_u32regex_iterator(const UChar* p, const u32regex& e, regex_constants::match_flag_type m = regex_constants::match_default)
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| 171 | {
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| 172 | return u32regex_iterator<const UChar*>(p, p+u_strlen(p), e, m);
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| 173 | }
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| 174 | #endif
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| 175 | template <class charT, class Traits, class Alloc>
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| 176 | inline u32regex_iterator<typename std::basic_string<charT, Traits, Alloc>::const_iterator> make_u32regex_iterator(const std::basic_string<charT, Traits, Alloc>& p, const u32regex& e, regex_constants::match_flag_type m = regex_constants::match_default)
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| 177 | {
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| 178 | typedef typename std::basic_string<charT, Traits, Alloc>::const_iterator iter_type;
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| 179 | return u32regex_iterator<iter_type>(p.begin(), p.end(), e, m);
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| 180 | }
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| 181 | inline u32regex_iterator<const UChar*> make_u32regex_iterator(const UnicodeString& s, const u32regex& e, regex_constants::match_flag_type m = regex_constants::match_default)
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| 182 | {
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| 183 | return u32regex_iterator<const UChar*>(s.getBuffer(), s.getBuffer() + s.length(), e, m);
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| 184 | }
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| 185 |
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| 186 | #ifdef BOOST_HAS_ABI_HEADERS
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| 187 | # include BOOST_ABI_SUFFIX
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| 188 | #endif
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| 189 |
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| 190 | } // namespace boost
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| 191 |
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| 192 | #endif // BOOST_REGEX_V4_REGEX_ITERATOR_HPP
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| 193 |
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